./Ultimate.py --spec ../../sv-benchmarks/c/ReachSafety.prp --file ../../sv-benchmarks/c/recursive-simple/id2_b3_o2_false-unreach-call_true-termination_true-no-overflow.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5842f4b8 Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_7778876f-debd-4426-ac1f-0e21f2fe70b8/bin-2019/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_7778876f-debd-4426-ac1f-0e21f2fe70b8/bin-2019/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_7778876f-debd-4426-ac1f-0e21f2fe70b8/bin-2019/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_7778876f-debd-4426-ac1f-0e21f2fe70b8/bin-2019/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/recursive-simple/id2_b3_o2_false-unreach-call_true-termination_true-no-overflow.c -s /tmp/vcloud-vcloud-master/worker/working_dir_7778876f-debd-4426-ac1f-0e21f2fe70b8/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_7778876f-debd-4426-ac1f-0e21f2fe70b8/bin-2019/utaipan --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash a033d09eab07f8bc6e49bb4301ebd6c89110f535 .................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.1.23-5842f4b [2018-11-18 10:32:57,726 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-18 10:32:57,727 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-18 10:32:57,735 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-18 10:32:57,736 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-18 10:32:57,736 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-18 10:32:57,737 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-18 10:32:57,738 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-18 10:32:57,739 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-18 10:32:57,740 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-18 10:32:57,740 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-18 10:32:57,741 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-18 10:32:57,741 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-18 10:32:57,742 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-18 10:32:57,742 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-18 10:32:57,743 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-18 10:32:57,743 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-18 10:32:57,744 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-18 10:32:57,745 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-18 10:32:57,746 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-18 10:32:57,746 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-18 10:32:57,747 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-18 10:32:57,748 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-18 10:32:57,748 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-18 10:32:57,748 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-18 10:32:57,749 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-18 10:32:57,749 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-18 10:32:57,750 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-18 10:32:57,750 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-18 10:32:57,751 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-18 10:32:57,751 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-18 10:32:57,752 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-18 10:32:57,752 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-18 10:32:57,752 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-18 10:32:57,753 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-18 10:32:57,753 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-18 10:32:57,753 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_7778876f-debd-4426-ac1f-0e21f2fe70b8/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2018-11-18 10:32:57,762 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-18 10:32:57,763 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-18 10:32:57,763 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-18 10:32:57,763 INFO L133 SettingsManager]: * User list type=DISABLED [2018-11-18 10:32:57,764 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-11-18 10:32:57,764 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-11-18 10:32:57,764 INFO L133 SettingsManager]: * Explicit value domain=true [2018-11-18 10:32:57,764 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-11-18 10:32:57,764 INFO L133 SettingsManager]: * Octagon Domain=false [2018-11-18 10:32:57,764 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-11-18 10:32:57,764 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-11-18 10:32:57,764 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-11-18 10:32:57,765 INFO L133 SettingsManager]: * Interval Domain=false [2018-11-18 10:32:57,765 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-18 10:32:57,765 INFO L133 SettingsManager]: * sizeof long=4 [2018-11-18 10:32:57,765 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-18 10:32:57,766 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-11-18 10:32:57,766 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-18 10:32:57,766 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-18 10:32:57,766 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-18 10:32:57,766 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-18 10:32:57,766 INFO L133 SettingsManager]: * sizeof long double=12 [2018-11-18 10:32:57,766 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-18 10:32:57,766 INFO L133 SettingsManager]: * Use constant arrays=true [2018-11-18 10:32:57,767 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-18 10:32:57,767 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-18 10:32:57,767 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-18 10:32:57,767 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-18 10:32:57,767 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-18 10:32:57,767 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-18 10:32:57,767 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-18 10:32:57,767 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-18 10:32:57,767 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-18 10:32:57,767 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-11-18 10:32:57,768 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-18 10:32:57,769 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-18 10:32:57,769 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-11-18 10:32:57,769 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/working_dir_7778876f-debd-4426-ac1f-0e21f2fe70b8/bin-2019/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a033d09eab07f8bc6e49bb4301ebd6c89110f535 [2018-11-18 10:32:57,792 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-18 10:32:57,801 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-18 10:32:57,804 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-18 10:32:57,805 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-18 10:32:57,805 INFO L276 PluginConnector]: CDTParser initialized [2018-11-18 10:32:57,806 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_7778876f-debd-4426-ac1f-0e21f2fe70b8/bin-2019/utaipan/../../sv-benchmarks/c/recursive-simple/id2_b3_o2_false-unreach-call_true-termination_true-no-overflow.c [2018-11-18 10:32:57,847 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_7778876f-debd-4426-ac1f-0e21f2fe70b8/bin-2019/utaipan/data/da19fbce0/2bf4fcf9d00f4ff8b327be1941ad0b61/FLAG73c177c81 [2018-11-18 10:32:58,244 INFO L307 CDTParser]: Found 1 translation units. [2018-11-18 10:32:58,245 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_7778876f-debd-4426-ac1f-0e21f2fe70b8/sv-benchmarks/c/recursive-simple/id2_b3_o2_false-unreach-call_true-termination_true-no-overflow.c [2018-11-18 10:32:58,248 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_7778876f-debd-4426-ac1f-0e21f2fe70b8/bin-2019/utaipan/data/da19fbce0/2bf4fcf9d00f4ff8b327be1941ad0b61/FLAG73c177c81 [2018-11-18 10:32:58,258 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_7778876f-debd-4426-ac1f-0e21f2fe70b8/bin-2019/utaipan/data/da19fbce0/2bf4fcf9d00f4ff8b327be1941ad0b61 [2018-11-18 10:32:58,261 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-18 10:32:58,262 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-11-18 10:32:58,262 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-18 10:32:58,263 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-18 10:32:58,266 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-18 10:32:58,266 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 10:32:58" (1/1) ... [2018-11-18 10:32:58,268 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6e779c11 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 10:32:58, skipping insertion in model container [2018-11-18 10:32:58,269 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 10:32:58" (1/1) ... [2018-11-18 10:32:58,277 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-18 10:32:58,290 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-11-18 10:32:58,399 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-18 10:32:58,400 INFO L191 MainTranslator]: Completed pre-run [2018-11-18 10:32:58,410 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-18 10:32:58,417 INFO L195 MainTranslator]: Completed translation [2018-11-18 10:32:58,418 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 10:32:58 WrapperNode [2018-11-18 10:32:58,418 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-18 10:32:58,418 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-18 10:32:58,418 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-18 10:32:58,418 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-18 10:32:58,423 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 10:32:58" (1/1) ... [2018-11-18 10:32:58,426 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 10:32:58" (1/1) ... [2018-11-18 10:32:58,430 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-18 10:32:58,430 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-18 10:32:58,430 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-18 10:32:58,431 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-18 10:32:58,438 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 10:32:58" (1/1) ... [2018-11-18 10:32:58,438 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 10:32:58" (1/1) ... [2018-11-18 10:32:58,439 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 10:32:58" (1/1) ... [2018-11-18 10:32:58,439 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 10:32:58" (1/1) ... [2018-11-18 10:32:58,441 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 10:32:58" (1/1) ... [2018-11-18 10:32:58,443 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 10:32:58" (1/1) ... [2018-11-18 10:32:58,444 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 10:32:58" (1/1) ... [2018-11-18 10:32:58,445 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-18 10:32:58,445 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-18 10:32:58,445 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-18 10:32:58,445 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-18 10:32:58,446 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 10:32:58" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_7778876f-debd-4426-ac1f-0e21f2fe70b8/bin-2019/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-18 10:32:58,510 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-18 10:32:58,510 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-18 10:32:58,510 INFO L130 BoogieDeclarations]: Found specification of procedure id2 [2018-11-18 10:32:58,510 INFO L138 BoogieDeclarations]: Found implementation of procedure id2 [2018-11-18 10:32:58,511 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-18 10:32:58,511 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-18 10:32:58,511 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-18 10:32:58,511 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-18 10:32:58,511 INFO L130 BoogieDeclarations]: Found specification of procedure id [2018-11-18 10:32:58,511 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2018-11-18 10:32:58,608 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-18 10:32:58,609 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 10:32:58 BoogieIcfgContainer [2018-11-18 10:32:58,609 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-18 10:32:58,609 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-18 10:32:58,609 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-18 10:32:58,611 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-18 10:32:58,611 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 10:32:58" (1/3) ... [2018-11-18 10:32:58,612 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4457e473 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 10:32:58, skipping insertion in model container [2018-11-18 10:32:58,612 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 10:32:58" (2/3) ... [2018-11-18 10:32:58,613 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4457e473 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 10:32:58, skipping insertion in model container [2018-11-18 10:32:58,613 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 10:32:58" (3/3) ... [2018-11-18 10:32:58,614 INFO L112 eAbstractionObserver]: Analyzing ICFG id2_b3_o2_false-unreach-call_true-termination_true-no-overflow.c [2018-11-18 10:32:58,620 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-18 10:32:58,624 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-18 10:32:58,633 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-18 10:32:58,658 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-18 10:32:58,658 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-18 10:32:58,658 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-18 10:32:58,659 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-18 10:32:58,659 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-18 10:32:58,659 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-18 10:32:58,659 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-18 10:32:58,659 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-18 10:32:58,672 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states. [2018-11-18 10:32:58,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-11-18 10:32:58,675 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 10:32:58,676 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 10:32:58,677 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 10:32:58,680 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 10:32:58,680 INFO L82 PathProgramCache]: Analyzing trace with hash 128923731, now seen corresponding path program 1 times [2018-11-18 10:32:58,681 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 10:32:58,716 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 10:32:58,717 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 10:32:58,717 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 10:32:58,717 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 10:32:58,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 10:32:58,831 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 10:32:58,833 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 10:32:58,833 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-18 10:32:58,833 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-18 10:32:58,836 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-18 10:32:58,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-18 10:32:58,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-18 10:32:58,849 INFO L87 Difference]: Start difference. First operand 28 states. Second operand 5 states. [2018-11-18 10:32:58,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 10:32:58,898 INFO L93 Difference]: Finished difference Result 40 states and 46 transitions. [2018-11-18 10:32:58,898 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-18 10:32:58,899 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2018-11-18 10:32:58,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 10:32:58,907 INFO L225 Difference]: With dead ends: 40 [2018-11-18 10:32:58,907 INFO L226 Difference]: Without dead ends: 26 [2018-11-18 10:32:58,910 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-18 10:32:58,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-11-18 10:32:58,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2018-11-18 10:32:58,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-11-18 10:32:58,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2018-11-18 10:32:58,937 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 13 [2018-11-18 10:32:58,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 10:32:58,937 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2018-11-18 10:32:58,937 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-18 10:32:58,937 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2018-11-18 10:32:58,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-11-18 10:32:58,939 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 10:32:58,939 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 10:32:58,939 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 10:32:58,939 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 10:32:58,939 INFO L82 PathProgramCache]: Analyzing trace with hash 1945633833, now seen corresponding path program 1 times [2018-11-18 10:32:58,939 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 10:32:58,940 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 10:32:58,940 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 10:32:58,940 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 10:32:58,941 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 10:32:58,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 10:32:59,017 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 10:32:59,018 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 10:32:59,018 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-18 10:32:59,018 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-18 10:32:59,019 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-18 10:32:59,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-18 10:32:59,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-18 10:32:59,020 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand 5 states. [2018-11-18 10:32:59,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 10:32:59,054 INFO L93 Difference]: Finished difference Result 44 states and 52 transitions. [2018-11-18 10:32:59,054 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-18 10:32:59,054 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2018-11-18 10:32:59,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 10:32:59,055 INFO L225 Difference]: With dead ends: 44 [2018-11-18 10:32:59,055 INFO L226 Difference]: Without dead ends: 32 [2018-11-18 10:32:59,056 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-18 10:32:59,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-11-18 10:32:59,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2018-11-18 10:32:59,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-11-18 10:32:59,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2018-11-18 10:32:59,061 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 20 [2018-11-18 10:32:59,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 10:32:59,062 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2018-11-18 10:32:59,062 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-18 10:32:59,062 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2018-11-18 10:32:59,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-11-18 10:32:59,062 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 10:32:59,063 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 10:32:59,063 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 10:32:59,063 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 10:32:59,063 INFO L82 PathProgramCache]: Analyzing trace with hash 1974262984, now seen corresponding path program 1 times [2018-11-18 10:32:59,063 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 10:32:59,064 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 10:32:59,064 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 10:32:59,064 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 10:32:59,064 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 10:32:59,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 10:32:59,173 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 10:32:59,174 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 10:32:59,174 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2018-11-18 10:32:59,174 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-18 10:32:59,174 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-11-18 10:32:59,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-11-18 10:32:59,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2018-11-18 10:32:59,175 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand 8 states. [2018-11-18 10:32:59,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 10:32:59,208 INFO L93 Difference]: Finished difference Result 36 states and 40 transitions. [2018-11-18 10:32:59,208 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-11-18 10:32:59,208 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 20 [2018-11-18 10:32:59,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 10:32:59,209 INFO L225 Difference]: With dead ends: 36 [2018-11-18 10:32:59,209 INFO L226 Difference]: Without dead ends: 32 [2018-11-18 10:32:59,209 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2018-11-18 10:32:59,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-11-18 10:32:59,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2018-11-18 10:32:59,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-11-18 10:32:59,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2018-11-18 10:32:59,214 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 20 [2018-11-18 10:32:59,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 10:32:59,215 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2018-11-18 10:32:59,215 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-11-18 10:32:59,215 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2018-11-18 10:32:59,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-11-18 10:32:59,216 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 10:32:59,217 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 10:32:59,217 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 10:32:59,217 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 10:32:59,217 INFO L82 PathProgramCache]: Analyzing trace with hash 1423155149, now seen corresponding path program 1 times [2018-11-18 10:32:59,217 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 10:32:59,218 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 10:32:59,218 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 10:32:59,218 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 10:32:59,218 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 10:32:59,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 10:32:59,286 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-11-18 10:32:59,286 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 10:32:59,286 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-18 10:32:59,286 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-18 10:32:59,287 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-18 10:32:59,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-18 10:32:59,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-18 10:32:59,287 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand 5 states. [2018-11-18 10:32:59,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 10:32:59,300 INFO L93 Difference]: Finished difference Result 48 states and 55 transitions. [2018-11-18 10:32:59,301 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-18 10:32:59,301 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 27 [2018-11-18 10:32:59,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 10:32:59,302 INFO L225 Difference]: With dead ends: 48 [2018-11-18 10:32:59,302 INFO L226 Difference]: Without dead ends: 36 [2018-11-18 10:32:59,302 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-18 10:32:59,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-11-18 10:32:59,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 34. [2018-11-18 10:32:59,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-11-18 10:32:59,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2018-11-18 10:32:59,307 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 27 [2018-11-18 10:32:59,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 10:32:59,307 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2018-11-18 10:32:59,307 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-18 10:32:59,307 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2018-11-18 10:32:59,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-11-18 10:32:59,308 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 10:32:59,308 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 10:32:59,308 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 10:32:59,308 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 10:32:59,309 INFO L82 PathProgramCache]: Analyzing trace with hash 1226641644, now seen corresponding path program 1 times [2018-11-18 10:32:59,309 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 10:32:59,309 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 10:32:59,309 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 10:32:59,310 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 10:32:59,310 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 10:32:59,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 10:32:59,375 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-11-18 10:32:59,376 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 10:32:59,376 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-18 10:32:59,376 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-18 10:32:59,376 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-18 10:32:59,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-18 10:32:59,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-18 10:32:59,377 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand 5 states. [2018-11-18 10:32:59,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 10:32:59,389 INFO L93 Difference]: Finished difference Result 40 states and 44 transitions. [2018-11-18 10:32:59,390 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-18 10:32:59,390 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 27 [2018-11-18 10:32:59,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 10:32:59,391 INFO L225 Difference]: With dead ends: 40 [2018-11-18 10:32:59,391 INFO L226 Difference]: Without dead ends: 36 [2018-11-18 10:32:59,391 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-18 10:32:59,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-11-18 10:32:59,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 34. [2018-11-18 10:32:59,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-11-18 10:32:59,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2018-11-18 10:32:59,394 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 27 [2018-11-18 10:32:59,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 10:32:59,394 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2018-11-18 10:32:59,394 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-18 10:32:59,395 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2018-11-18 10:32:59,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-11-18 10:32:59,395 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 10:32:59,395 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 10:32:59,395 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 10:32:59,395 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 10:32:59,396 INFO L82 PathProgramCache]: Analyzing trace with hash 1255270795, now seen corresponding path program 1 times [2018-11-18 10:32:59,396 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 10:32:59,396 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 10:32:59,396 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 10:32:59,396 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 10:32:59,397 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 10:32:59,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-18 10:32:59,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-18 10:32:59,434 INFO L442 BasicCegarLoop]: Counterexample might be feasible [2018-11-18 10:32:59,453 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.11 10:32:59 BoogieIcfgContainer [2018-11-18 10:32:59,453 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-18 10:32:59,454 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-11-18 10:32:59,454 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-11-18 10:32:59,454 INFO L276 PluginConnector]: Witness Printer initialized [2018-11-18 10:32:59,454 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 10:32:58" (3/4) ... [2018-11-18 10:32:59,455 INFO L138 WitnessPrinter]: Generating witness for reachability counterexample [2018-11-18 10:32:59,484 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_7778876f-debd-4426-ac1f-0e21f2fe70b8/bin-2019/utaipan/witness.graphml [2018-11-18 10:32:59,484 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-11-18 10:32:59,485 INFO L168 Benchmark]: Toolchain (without parser) took 1223.62 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 146.8 MB). Free memory was 959.2 MB in the beginning and 1.0 GB in the end (delta: -72.6 MB). Peak memory consumption was 74.2 MB. Max. memory is 11.5 GB. [2018-11-18 10:32:59,486 INFO L168 Benchmark]: CDTParser took 0.16 ms. Allocated memory is still 1.0 GB. Free memory is still 985.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-18 10:32:59,486 INFO L168 Benchmark]: CACSL2BoogieTranslator took 155.44 ms. Allocated memory is still 1.0 GB. Free memory was 959.2 MB in the beginning and 948.5 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-11-18 10:32:59,487 INFO L168 Benchmark]: Boogie Procedure Inliner took 12.10 ms. Allocated memory is still 1.0 GB. Free memory is still 948.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-18 10:32:59,487 INFO L168 Benchmark]: Boogie Preprocessor took 14.39 ms. Allocated memory is still 1.0 GB. Free memory was 948.5 MB in the beginning and 945.8 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. [2018-11-18 10:32:59,487 INFO L168 Benchmark]: RCFGBuilder took 163.95 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 146.8 MB). Free memory was 945.8 MB in the beginning and 1.1 GB in the end (delta: -184.6 MB). Peak memory consumption was 14.5 MB. Max. memory is 11.5 GB. [2018-11-18 10:32:59,488 INFO L168 Benchmark]: TraceAbstraction took 844.20 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 98.6 MB). Peak memory consumption was 98.6 MB. Max. memory is 11.5 GB. [2018-11-18 10:32:59,488 INFO L168 Benchmark]: Witness Printer took 30.55 ms. Allocated memory is still 1.2 GB. Free memory is still 1.0 GB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-18 10:32:59,490 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16 ms. Allocated memory is still 1.0 GB. Free memory is still 985.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 155.44 ms. Allocated memory is still 1.0 GB. Free memory was 959.2 MB in the beginning and 948.5 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 12.10 ms. Allocated memory is still 1.0 GB. Free memory is still 948.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 14.39 ms. Allocated memory is still 1.0 GB. Free memory was 948.5 MB in the beginning and 945.8 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. * RCFGBuilder took 163.95 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 146.8 MB). Free memory was 945.8 MB in the beginning and 1.1 GB in the end (delta: -184.6 MB). Peak memory consumption was 14.5 MB. Max. memory is 11.5 GB. * TraceAbstraction took 844.20 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 98.6 MB). Peak memory consumption was 98.6 MB. Max. memory is 11.5 GB. * Witness Printer took 30.55 ms. Allocated memory is still 1.2 GB. Free memory is still 1.0 GB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 25]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L22] unsigned int input = __VERIFIER_nondet_uint(); [L23] CALL, EXPR id(input) VAL [\old(x)=2] [L8] COND FALSE !(x==0) VAL [\old(x)=2, x=2] [L9] CALL, EXPR id2(x-1) VAL [\old(x)=1] [L15] COND FALSE !(x==0) VAL [\old(x)=1, x=1] [L16] CALL, EXPR id(x-1) VAL [\old(x)=0] [L8] COND TRUE x==0 [L8] RET return 0; VAL [\old(x)=0, \result=0, x=0] [L16] EXPR id(x-1) VAL [\old(x)=1, id(x-1)=0, x=1] [L16] unsigned int ret = id(x-1) + 1; [L17] COND FALSE !(ret > 3) [L18] RET return ret; VAL [\old(x)=1, \result=1, ret=1, x=1] [L9] EXPR id2(x-1) VAL [\old(x)=2, id2(x-1)=1, x=2] [L9] unsigned int ret = id2(x-1) + 1; [L10] COND FALSE !(ret > 3) [L11] RET return ret; VAL [\old(x)=2, \result=2, ret=2, x=2] [L23] EXPR id(input) VAL [id(input)=2, input=2] [L23] unsigned int result = id(input); [L24] COND TRUE result == 2 VAL [input=2, result=2] [L25] __VERIFIER_error() VAL [input=2, result=2] - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 28 locations, 1 error locations. UNSAFE Result, 0.8s OverallTime, 6 OverallIterations, 2 TraceHistogramMax, 0.1s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 142 SDtfs, 8 SDslu, 479 SDs, 0 SdLazy, 67 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 29 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=34occurred in iteration=4, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 5 MinimizatonAttempts, 8 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 134 NumberOfCodeBlocks, 134 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 102 ConstructedInterpolants, 0 QuantifiedInterpolants, 5478 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 5 InterpolantComputations, 5 PerfectInterpolantSequences, 8/8 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...